package com.forum.ajax.homepage;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.json.JSONObject;

import com.forum.domain.Groups;
import com.forum.domain.GroupsDAO;
import com.forum.domain.Ucg;
import com.forum.domain.UcgDAO;
import com.forum.domain.User;
import com.forum.domain.UserDAO;

public class UnfollowGroup extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public UnfollowGroup() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
	}

	/**
	 * The doPost method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		request.setCharacterEncoding("utf-8");
		response.setContentType("text/html; charset=utf-8");
		PrintWriter out = response.getWriter();

		String type = request.getParameter("type");
		int id = Integer.parseInt(request.getParameter("id"));
		UserDAO userdao = new UserDAO();
		User user = userdao.findById(id);

		int groupid = Integer.parseInt(request.getParameter("groupid"));
		GroupsDAO groupdao = new GroupsDAO();
		Groups group = groupdao.findById(groupid);

		try {
			if (type.equals("unfollow")) {
				UcgDAO ucgdao = new UcgDAO();
				List<Ucg> ucglist = ucgdao.findByProperty("user", user);
				for (int i = 0; i < ucglist.size(); i++) {
					if (ucglist.get(i).getGroups() == group) {
						ucgdao.delete(ucglist.get(i));
						ucgdao.getSession().beginTransaction().commit();
						user.setGroupcount(user.getGroupcount() - 1);
						group.setFollowercount(group.getFollowercount() - 1);
						break;
					}
				}
				out.print("success");
			} else {
				UcgDAO ucgdao = new UcgDAO();
				List<Ucg> ucglist = ucgdao.findByProperty("user", user);
				for (int i = 0; i < ucglist.size(); i++) {
					if (ucglist.get(i).getGroups() == group) {
						out.print("已经关注!");
						return;
					}
				}
				Ucg ucg = new Ucg(group, user);
				ucgdao.save(ucg);
				ucgdao.getSession().beginTransaction().commit();
				user.setGroupcount(user.getGroupcount() + 1);
				group.setFollowercount(group.getFollowercount() + 1);

				JSONObject groupJsonObject = new JSONObject();
				groupJsonObject.accumulate("name", group.getName());
				groupJsonObject.accumulate("userNickname", group.getUser()
						.getNickname());
				groupJsonObject.accumulate("id", group.getId());
				groupJsonObject.accumulate("intro", group.getIntroduction());
				groupJsonObject.accumulate("time", group.getBuilddate());

				out.print(groupJsonObject);
			}
		} catch (Exception e) {
			e.printStackTrace();
			out.print("error");
		}

	}

	/**
	 * Initialization of the servlet. <br>
	 * 
	 * @throws ServletException
	 *             if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
